Supermassive Black Hole Simulation
Universe SandboxYep, and be careful, it can crash your computer
Other
1,676subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Oct 9, 2025
Mods: Universe Sandbox
Mods for your games from Steam Workshop and Source.
Counts describe mods indexed by GameRadar. Workshop popularity is measured in subscriptions.
Indexed mods: 456
Black Hole with a accurate accretion disk
Universe SandboxAs the title suggests, I’ve never seen a black hole with a functioning accretion disk in this workshop or in the game, so I decided to make one myself.
Other
1,668subscriptionsno growth · 22 hr. agoUpdated: Apr 11, 2025
Outer Wilds
Universe SandboxWow, this is my most popular workshop submission ever. Not just on Universe Sandbox, but ever. Thank you all very much, this single system has more downloads than all my other hundreds of workshop items that I've posted
Other
1,655subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Nov 12, 2025
Planet X Crashes
Universe SandboxNASA HAS ISSUED A PLANETARY COLLISION AND NO ONE WILL SURVIVE, THIS IS THE END OF THE WORLD Update: Changed Planet X, Changed Earth, and added the moon.
Other
1,632subscriptionsno growth · 13 hr. agoUpdated: Dec 2, 2019
Terraformed Ganymede (100%)
Universe SandboxA fully terraformed Ganymede, with vegetation, oceans, a habitable atmosphere and city lights. - - - - - - - - - - Terraformed Bodies Collection (100%): https://steamcommunity.com/sharedfiles/filedetails/?id=1746520149 T
Other
1,610subscriptionsno growth · 13 hr. agoUpdated: May 22, 2019
Expirimental Galaxy
Universe SandboxThis Galaxy has been built from scratch including over 18k particles (This may melt your computer) This Galaxy is not made to be realistic but Im just testing the particle system for an upcoming project (Keep checking in
Other
1,605subscriptions≈ -1 subscribers / day · 13 hr. agoUpdated: Jul 2, 2018
SpookVooper Pack
Universe SandboxContains all of the SpookVooper planets. Please treat with care.
Other
1,604subscriptionsno growth · 13 hr. agoUpdated: Jun 19, 2018
See 2 Believe II
Universe SandboxWARNING: Strobe Effect Lighting as this wobbles quickly. If you are photosensitive or have epilepsy, please avoid this one, or don't unpause while close up. (See Below) WOW Gotta see to believe. Magical Sirius B is beaut
Other
1,600subscriptionsno growth · 13 hr. agoUpdated: Sep 18, 2022
1,571subscriptions≈ +1 subscribers / day · 13 hr. agoUpdated: Dec 26, 2022
Avatar, From Pandoora to Sol
Universe SandboxWelcome to the Universe of Avatar Welcome to the Universe of Avatar, a large-scale simulation recreating the Alpha Centauri star system alongside our Solar System. This simulation includes: • Alpha Centauri A, Alpha Cent
Other
1,558subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Apr 15, 2026
Prebiotic Earth
Universe SandboxPREBIOTIC EARTH, SECOND ATMOSPHERE The Pale Orange Dot For a brief moment, you question the reliability of your timewarp, as you gaze down upon a ball of orange mist you could only really describe as Titanian in appearan
Other
1,551subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Mar 9, 2026
HD Jupiter (Jupiter Redesign)
Universe SandboxI've had the opinion that Jupiter in this game just, eh, does NOT look right. If you look at captures by the Hubble Telescope or Voyager, you can tell right away that the base Jupiter from this game is missing quite alot
Other
1,541subscriptions≈ -1 subscribers / day · 13 hr. agoUpdated: Nov 2, 2021
The Outer Wilds
Universe SandboxThe star system from Outer Wilds. Don't forget to bring your banjo, or you might fall victim to the relentless march of time!
Other
1,526subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Apr 17, 2025
1,523subscriptionsno growth · 12 hr. agoUpdated: Jul 4, 2018
Terraformed Solar System Objects Pack
Universe SandboxIn case you want to use this, credit me in the simulation or video if it is ever uploaded to the steam workshop. -BlueMarble
Other
1,507subscriptionsno growth · 13 hr. agoUpdated: Aug 29, 2018
Terraformed Neptune (100%)
Universe SandboxA fully terraformed Neptune with vegetation, oceans, a habitable atmosphere, climate and city lights. ***NOTE: For Neptune, I had to use a custom surface, but as the original planet is a gas giant, I tried to use a surfa
Other
1,492subscriptionsno growth · 13 hr. agoUpdated: May 26, 2019
1,430subscriptions≈ +1 subscribers / day · 18 hr. agoUpdated: Feb 6, 2026
Terraformed Uranus (100%)
Universe SandboxA fully terraformed Uranus, with rings, vegetation, oceans, a habitable atmosphere, climate and city lights. ***NOTE: For Uranus, I had to use a custom surface, but as the original planet is a gas giant, I tried to use a
Other
1,412subscriptionsno growth · 13 hr. agoUpdated: May 26, 2019
Kerbal Space Pogramm solar system V2
Universe SandboxKsp solar system Already in the game: Moho Eve + Gilly Kerbin+ Moons Duna + Ike Dres Jool+Moons Eloo Coming soon: Interstellar Planets (ksp2) Pls leave a like XD
Other
1,408subscriptionsno growth · 13 hr. agoUpdated: Mar 18, 2021
Flat Earth in Universe Sandbox
Universe SandboxStupidity at its finest. All objects made by me (Madplanetguy), give credit if you use these in a simulation If you enjoy, drop a follow as I will make a lot more planets!
Other
1,361subscriptions≈ +2 subscribers / day · 18 hr. agoUpdated: Mar 22, 2021
Only New Zealand
Universe SandboxTribute for New Zealand for not appearing in most maps after Antartica despite how big and populated it is, Handcrafted with Planetscapping Feature from Universe Sandbox for 1 Hour, The most realistic Handcrafted New Zea
Other
1,336subscriptionsno growth · 13 hr. agoUpdated: Jan 25, 2022
Cube Universe
Universe SandboxA universe made of Cubes! Give Credit if you use any of these items Made by me (Madplanetguy) My YouTube My Discord
Other
1,301subscriptionsno growth · 18 hr. agoUpdated: Nov 9, 2020
3D Terrain Generation
Universe SandboxUnlike planets, asteroids have depth, large craters, and huge mountains. Even though planets look 3D, if you land on them, they aren't. I started playing around with asteroids, and realised they have elevation maps! So,
Other
1,300subscriptions≈ +1 subscribers / day · 22 hr. agoUpdated: Jul 15, 2025
Kerbal Space Program solar system to scale
Universe SandboxContains all stock planets to ten times the distance from sun. And all planets are to scale and moons measurements are taken from the game Thanks for downloading
Other
1,222subscriptions≈ +1 subscribers / day · 18 hr. agoUpdated: Dec 4, 2024